Finding the Fourth Proportional to 9,997.20, 13,796.15 and 5,521.14

Step by Step Solution

1. Step 1: Write the proportion equation
   9,997.20 : 13,796.15 = 5,521.14 : x
2. Step 2: Convert to fraction form
   9,997.20/13,796.15 = 5,521.14/x
3. Step 3: Cross multiply
   9,997.20x = 13,796.15 × 5,521.14
4. Step 4: Simplify right side
   9,997.20x = 76,170,475.61
5. Step 5: Solve for x
   x = 76,170,475.61/9,997.20
6. Step 6: Final answer
   x = 7,619.18